Adjustable frequency on/off delay circuit

Details Adjustable frequency on/off delay circuit Adjustable frequency on/off delay circuit

1983-06-30

1986-06-17

Miller, S. D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307593, 307602, 307247R, H03K 513, H03K 5159

Patent

active

045958483

ABSTRACT:
An adjustable frequency ON/OFF delay circuit 2 is provided by ON and OFF delay counters 6 and 14 and respective adjustable frequency oscillators 4 and 20. The ON delay counter 6 is enabled by an input ON signal and clocked by its oscillator 4 to a given count for outputting a delayed output ON signal. This counter 6 is disabled by an input OFF signal and outputs the OFF signal without delay. The second counter 14 responds to the first counter 6 for outputting the delayed output ON signal without further delay, and for delaying the output OFF signal. Circuit 2 is ideal for proximity switch applications, particularly photoelectric type proximity switches, for providing a delayed output signal following a given sensed condition.

REFERENCES:
patent: 3755695 (1973-08-01), Krick et al.
patent: 3794857 (1974-02-01), Milovancevic
patent: 3950657 (1976-04-01), Sheng et al.
patent: 4047058 (1977-05-01), Green

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